Acid Proof Bricks & Mortars

ACID PROOF BRICKS (IS 4860)
Characteristic	Class I	Class II
Water Absorption (%) max.	2	4
Flexural Strength (kg/cm2) min.	100	500
Compressive Strength (kg/cm2 min.	700	500
Resistance to Acid/ Loss in weight (%) max.	1.5	4.0

ACID RESISTANT MORTARS (IS 4832 - Part I)
Property	Sodium Silicate Type	Potassium Silicate Type
Working time (minutes) min. at 27±2ºC	15	20
Flexural Strength (kg/cm2) min. at 7 days	35	40
Compressive Strength (kg/cm2 min. at 7 days	100	150
Bond Strength (kg/cm2) min.	5
Absorption of Toluene (% by weight) max.	18

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